You said the problem started several months ago. Did you do any cleanup
back then, like getting rid of programs for processes you thought
weren't necessary or as part of a cleanup to get rid of fluffware from
wasting memory and CPU cycles? I did that on a Dell a long time ago. I
found processes for programs that seemed superfluous. I didn't need nor
want all the fluff features that Dell shoved into their laptops, so I
either uninstall those programs or manually cleaned them out. Turned
out that what looked like a fluff featured keyboard program turned out
to also be a dynamic driver (loads on demand instead of during Windows
boot) and as a startup entry that I thought was superfluous. After
removing uninstalling the program, some features of the keyboard were no
longer available (too long for me to remember what got removed). Alas,
Dell with their provided install media required I'd install their suite
program of lots of fluffware just to get back that one keyboard program.
I managed to find the right download from their site for just that
keyboard program, installed it, and got full functionality of the
keyboard.